Caddisfly (Larva)
Scientific Name: Trichoptera (larva), specific genus/species cannot be identified from the image.
Order & Family: Order: Trichoptera (Caddisflies). Without a clearer view of specific larval features or the adult, precise family identification is difficult, as there are many families within this order (e.g., Limnephilidae, Leptoceridae, Hydropsychidae, Phryganeidae).
Size: Larval size varies greatly depending on the species and instar, generally ranging from a few millimeters to several centimeters (e.g., 5 mm to 30 mm). The case itself adds to the overall apparent size.
Natural Habitat
The image clearly shows a caddisfly larva within its case, which is an aquatic insect. They are found in a wide variety of freshwater habitats including streams, rivers, lakes, ponds, and wetlands. Their presence and diversity are often indicators of good water quality.
Diet & Feeding
Diet varies significantly by species. Caddisfly larvae can be herbivores (feeding on algae and aquatic plants), detritivores (feeding on decaying organic matter), predators (feeding on smaller aquatic insects), or omnivores. The type of case and mouthparts often indicate their feeding strategy.
Behavior Patterns
Case-bearing insects, the larvae construct and carry a portable case made of silk and environmental materials (like sand grains, bits of plants, or detritus). This case serves as protection as the larva grows and pupates inside it. Adult caddisflies are typically short-lived and may be attracted to lights at night.
Risks & Benefits
Caddisfly larvae are a crucial component of aquatic ecosystems, serving as an important food source for fish, amphibians, and other aquatic predators. Their presence is often used as a bioindicator for water quality, as different species have varying tolerance levels to pollution. They pose no direct risks to humans; some adult caddisflies can be a nuisance around lights due to their attraction, but they do not bite or sting.
Identified on: 9/2/2025